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Card 6

Front

What is the crust separated from the mantle by?

Back

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Card 7

Front

The crust has what density of rocks?

Back

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Card 8

Front

What is the crust rich in?

Back

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Card 9

Front

What type of rocks is oceanic crust mainly made of?

Back

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Card 10

Front

Approximately how thick is oceanic crust?

Back

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Card 11

Front

Continental crust can be as thick as how much?

Back

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Card 12

Front

The crust and upper - mantle are known collectively as what?

Back

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